"But I need those bags," plastic bag lovers say, when what they really mean is that they use those bags to carry groceries, pick up pet poop, discard vegetable peels or line the bathroom trash can.

That is not a need.

That is a habit. A routine. A customary behavior that, in this case, is also a convenience.

Wait, wait. Hang on to your rotten tomatoes. This isn't another lecture on why phasing out free plastic shopping bags is a good idea, though it is a good idea.

As a recovering plastic bag user who still too often forgets to bring my reusable bags to the grocery store, I'm only asking that you consider the idea that the enlightened people of the future will one day view our reckless plastic bag consumption as a curious 20th century custom. They will be amazed that we ever referred to it as need.

In its strict sense, a need is a necessity. It's something without which something else cannot survive.

For human beings, according to the famous hierarchy of needs devised by the psychologist Abraham Maslow, those needs range from the basic and physiological to the highest realm, called self-actualization.

I added "coffee" to Maslow's hierarchy because on the average morning it's on my needs chart ahead of food.

At 7 a.m., I really do perceive coffee as a need.

It's human nature. The more often you do something, the likelier you are to depend on it, crave it, confuse it with necessity. Though I reluctantly accept the fact that if coffee were banned tomorrow, I could survive, less actualized, on Earl Grey.

Habits come in various flavors. Good, bad and in-between.

The good kind are grounded in discipline and awareness. The bad kind are a mix of desire, self-indulgence and barely conscious choice.